Wraith Cooler Making Grinding Noise?

Alright, so my Wraith Cooler makes these odd grinding noises. It happens normally after a few hours of my PC being on. Even when idle.

It is extremely loud and lasts normally between 10 minutes to even a half hour. Then, it slowly fades away into this buzzing noise. After a bit of that it finally goes away.

This, i guess, started pretty much the first 5 minutes I booted up my PC after installing my new processor and cooler (Which was about 2-3 months ago). I also always try to keep my computer clean as much as possible. As of now there isn't any dust or anything that i'm aware of. Would have posted about this sooner but had never gotten around to it. Any idea what this could be?